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Position: Home > Articles > The Photosynthetic Characteristics of Michelia alba in Autumn Journal of Northwest Forestry University 2009,24 (6) 24-27

白兰花秋季光合特性研究

作  者:
尤扬;杨立峰;周建;任小瑞
单  位:
河南科技学院园林学院
关键词:
白兰花;光合速率;光饱和点;光补偿点
摘  要:
采用Li-6400型便携式光合作用测定系统测定了白兰花的光合特性。结果表明:白兰花净光合速率日变化呈双峰曲线,存在光合"午休"现象。最高峰出现在14:00左右,次高峰出现在9:00,日最大净光合速率为5.22μmol.m-2.s-1。净光合速率与蒸腾速率、气孔导度呈正相关,与胞间CO2浓度呈负相关。白兰花的光补偿点为10.38μmol.m-2.s-1,光饱和点为1 100μmol.m-2.s-1,具有一定的耐荫能力,是不耐强光的植物。
译  名:
The Photosynthetic Characteristics of Michelia alba in Autumn
作  者:
YOU Yang,YANG Li-feng,ZHOU Jian,REN Xiao-rui(School of Horticulture and Landscape Architecture Henan Institute of Science and Technology,Xinxiang,Henan 453003,China)
关键词:
Michelia alba;photosynthetic rate;light saturation point;light compensation point
摘  要:
The photosynthetic characteristics study of leaves in perennial evergreen arbor Michelia alba were determined with the Li-6400 Photosynthetic system.The results showed that the curve of daily of M.alba net photosynthetic rate was a double-peak curve and there was a clear depression at noon.Its first peak occurred at 14:00 p.m.,the second one at 9:00 a.m..The maximum of photosynthetic rate was 5.22 μmol·m-2·s-1.Correlation analysis showed that there were positive relationship between photosynthetic rate and transpiration rate and stomatal conductance,there is a negative relationship between photosynthetic rate and internal CO2 concentration.The light compensation point of M.alba is 10.38 μmol·m-2·s-1,its light saturation point is 1 100 μmol·m-2·s-1.The light compensation and saturation point indicates that M.alba is a little shade-resistant plant and it cann't bear the glare.

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